S870, S970 Series. Snap-action switches. Positive opening operation Self-cleaning contacts Catalogue D70.en
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1 Snap-action switches S870, S970 Series Snap-action switches Positive opening operation Self-cleaning contacts Catalogue D70.en
2 Snap-action switches S870/S970 Series Single break SPDT switches with positive opening operation and wiping contacts S870/S970 Series snap-action switches feature positive opening operation, which guarantees that even contacts which have become welded together due to a short-circuit will open reliably. Wiping contacts protected against dust, humidity and contaminants ensure high reliability even with small contact loads. Versions with gold contacts are especially suited for switching low voltages and small currents. A defined as well as repeatable switching action is possible thanks to the snap mechanism whose switching speed is virtually independent of the actuation speed. That is why snap-action switches are preferred in applications with slow actuation speeds, where they are used, for instance, as motor switches, position switches, or gear limit switches. Features Series 9 Variants for extreme conditions: Ruggedized housing made from polyetherimide (PEI). Designed for use in harsh environments. Improved resistance to extremes of temperature, chemicals and impact. IP Rating: Degrees of protection against dust, humidity, contaminants, or access to hazardous parts to IEC 6059: Contacts: IP0, IP60 or / :, IP0 or max Positive opening operation: Reliable breaking of the normally closed (NC) circuit even if the contacts have become welded together, in compliance with IEC , Annex K. Self-cleaning contacts: Continuous low contact resistance ensures high contact reliability over the entire design life of the switch. Single break contacts: Changeover switch, also available as NC or NO versions with leads or cable connection. Compact design. Contact material: Silver or gold Ag Au Design and function Actuator Contact area Standard: Push button Actuator styles: roller lever, plain lever or simulated roller lever Microswitch with SPDT, NC or NO contacts Positive opening operation and wiping contacts Contact material: Silver or gold Mounting Ganging (side mount) Flat tabs / solder lugs / PCB M3 screws with saddle clamp Factory-potted cable or leads S970 Better Resistance to temperature chemicals impact Variants for extreme conditions Schaltbau has developed special variants for use in harsh environments. The S970 Series has a ruggedized housing made from polyetherimide (PEI) that stands for improved resistance to: temperatures from -55 C to +50 C* chemicals (e.g. acids and alkalis) impact (PEI 50% more resistant than PC) The amber, transparent switches are ideally suited for applications where impact forces are high and/or frequent as well as for use in products that are exposed to strong chemicals or extremes of temperature. The S9xx Series switches have the same design, dimensions and technical features as the switches of the standard S8xx series, allowing for easy replacement and upgrade from a standard switch without additional implementation effort. Applications S970 switches are typically used with systems and components that require a high degree of safety and reliability, such as Limit switches for machine, door and plant control systems Control switches for the driver s desk of rail vehicles or crane consoles Switching elements for automation Safety limit switches for control systems and plant controls * Dependent on version Specifications are Specifications subject to alteration subject without to alterations! prior notice
3 3 Ordering code S870 / S970 Series S870 S970 Contact configuration W O S Parameter Identification Version (sealed to) IP rating: contacts / terminals IP0/00 IP60/00 /67 Actuator styles S870 Series, standard S970 Series, with improved resistance to temperature, chemicals and impact SPDT SPST-NC * SPST-NO * Ingress protection rating Contacts 3 A B D F G L Contact material IP0 IP60 (IP0* ) Screw-type Leads, opposite actuator side, length = 500 mm Flat tabs, 6.3 x 0.8 mm PCB, 80 Solder lugs Cable, opposite actuator side, length = 500 mm Silver Gold Example: Push button (standard) a S870 WDa Push button (standard) Plain lever, short Plain lever, long Plain lever, medium Roller lever, long Roller lever, short Simulated roller lever, medium Simulated roller lever, long Actuator a k l m r t u v This product catalogue comprises only stock items. For some variants minimum quantities apply. Please ask for conditions. Special variants: If you need a special variant of the switch, please do not hesitate to contact us. Maybe the type of switch you are looking for is among our many special designs. If not, we can also supply customized designs. In this case minimum quantities apply. * Only for versions with connected leads or cable * Only for versions with screw-type terminals S870 WD a / S970 WD a Sealed to IP0/ Push button (standard) Flat tabs 6.3x0.8 S870 WD a / S970 WD a Sealed to IP60/ Push button (standard) Flat tabs 6.3x0.8 S870 WF k / S970 WF k Sealed to IP0/ Plain lever, short PCB terminals 80 Plain lever, short k Plain lever, long l Plain lever, medium m Roller lever, long r S870 WG u / S970 WG u Sealed to IP0/ Simulated roller lever, medium Solder lugs Roller lever, short t Simulated roller lever, medium u Simulated roller lever, long v Series Contacts Ingress protection rating (IP code) Contact material S870 / S970 W / O / S / / 3 / IP0 IP60 S870 W3B r / S970 W3B r Sealed to / Roller lever, long Leads M3 screws with saddle clamp A Leads, opposite actuator side, length 500 mm B S870 W3L a / S970 W3L a Sealed to / Push button (standard) Cable Flat tabs 6.3 x 0.8 D PCB terminals, 80 F Solder lugs G Cable, opposite acutator side, length 500 mm Specifications are subject to alteration without prior notice L S870 WA t / S970 WA t Sealed to IP0/IP0 Roller lever, short Screw-type terminals
4 Specifications S870 / S970 Series IP Rating: Contacts / Standard Contact configuration IEC 6097 IP0/ + IP0/IP0 IP60/ / x SPDT, Form C, single break contacts, 3 terminals / x SPST-NC, Form B single break contacts, terminals / x SPST-NO, Form A, single break contacts, terminals Conventional thermal current I th UL A at T = 85 C IEC A at T = 85 C Rated insulation voltage U i IEC V UL V Data valid for new switches under laboratory conditions and at room temperature, unless otherwise mentioned. Pollution degree IEC 6097 UL 508 PD3 S870: PD3 / S970: PD Rated impulse withstand voltage U imp IEC 6097 kv Overvoltage category IEC 6097 OV3 Utilization category IEC 6097 AC-5: 30 V AC /.5 A DC-3: 60 V DC / 0.5 A for silver contacts * UL 508* 3 AC 0 V /.5 A DC 60 V / 0.5 A Contact gap, typical IEC 6097 x. mm Contact force, typical IEC N Contact resistance, typical, no leads connected IEC mω Positive opening force * IEC N Actuator travel for positive opening operation IEC 6097 see page 6, 7 Maximum actuator travel * IEC mm Actuation speed IEC m/s max. 0. mm/s min. Vibration resistance, Hz all directions (without aux. IEC g actuator at 0 µs max. opening time) Shock resistance (without aux. actuator at 0 µs max. IEC g, half sinus opening time) Short-circuit protection for silver contacts * IEC A gg Switching frequency, max. IEC operations/minute Actuation force * IEC N max. 3.0 N max. 3.0 N max. Release force * IEC N min. 0.5 N min. 0.5 N min. Ingress protection rating (IP code) Contacts IEC 6059 IP0 IP60 Screw-type IEC 6059 IP0 Flat tabs IEC 6059 PCB / Solder lugs IEC 6059 Leads / Cable IEC 6059 Mechanical endurance IEC million cycles, min. 5 million cycles, min. 5 million cycles, min. Ambient temperature Flat tabs / PCB / Solder lugs S870-0 C +85 C -0 C +85 C *5 S970 IEC C +50 C -55 C +50 C *5 Leads * S870/S970-0 C +85 C *5 Cable * S870/S C +85 C *5 Material Contacts Seal *6 Housing, upper part Housing, lower part Cable / Leads * UL/CSA silver (Ag90Ni0) or gold (AuNi3Ag6) brass, silver or gold plated S870: silicon, blue / S970: silicon, red S870: PC, light green, transparent / S970: PEI, amber, transparent S870: PC, black / S970: PEI, black Insulation: PVC / leads: AWG 8 Mounting position any Weight, no leads connected approx. 7 g, no aux. actuator / cable / leads Approvals C US * Data for gold contacts upon request * Measured next to push button *3 General Purpose * Others upon request *5 A slower release actuation may occur by rapidly changing air pressure *6 Only versions sealed to IP60/ and / Specifications are subject to alteration without prior notice
5 5 Dimension and circuit diagrams Dimensions S870 WDa / S970 WDa 6 ±0, Free position max. Circuit diagram SPDT: max ,5 S870 WDa / S970 WDa S870 W Da SPDT S870 W Da Contacts IP0 S870 W D a Flat tabs 6.3x0.8 mm S870 WD a Contact material silver S870 WD a Push button (standard) S970 W Da SPDT S970 W Da Contacts IP0 S970 W D a Flat tabs 6.3x0.8 mm S970 WD a Contact material silver S970 WD a Push button (standard) Dimensions S870 WD a / S970 WD a 6 ±0, Free position max. Circuit diagram SPDT: max ,5 S870 WDa / S970 WDa S870 W Da SPDT S870 W Da Contacts IP60 S870 W D a Flat tabs 6.3x0.8 mm S870 WD a Contact material silver S870 WD a Push button (standard) S970 W Da SPDT S970 W Da Contacts IP60 S970 W D a Flat tabs 6.3x0.8 mm S970 WD a Contact material silver S970 WD a Push button (standard) Dimensions S870 W3L a / S970 W3L a 6 ±0, Free position max. Circuit diagram SPDT: SPST-NC: 0.5 max Specifications are subject to alteration without prior notice / Dimensions in mm. SPST-NO: Leads AWG8 / blue Leads AWG8 / grey Leads AWG8 / black S870 W3La / S970 W3La S870 W 3La SPDT S870 W 3 La Contacts S870 W3 L a Cable, length 500 mm S870 W3L a Contact material silver S870 W3L a Push button (standard) S970 W 3La SPDT S970 W 3 La Contacts S970 W3 L a Cable, length 500 mm S970 W3L a Contact material silver S970 W3L a Push button (standard)
6 6 Actuator styles, actuator positions Push button (standard) Actuator style a Actuator IP0 IP60/ Push button (standard) a Free position 6.0 ± 0. Operating position.8 ± 0. Release position 5. ± 0. Total positive opening travel 3.3 Total travel position Plain lever, short Actuator style k 6 Plain lever k Lever length 5.7 Free position 7.5 ± 0. Operating position 5.9 ± 0.3 Release position 6. ± 0.3 Total positive opening travel 3.7 Total travel position Plain lever, long Actuator style l 6 Plain lever l Lever length 9. Free position. ± 0.5 Operating position 8.0 ± 0.6 Release position 8.8 ± 0.6 Total positive opening travel 3. Total travel position Plain lever, medium Actuator style m 6 Plain lever m Lever length 3.9 Free position 9.0 ± 0.5 Operating position 6.7 ± 0.35 Release position 7.3 ± 0.35 Total positive opening travel 3.5 Total travel position Dimensions in mm / Specifications are subject to alteration without prior notice
7 7 Actuator styles, actuator positions (continued) Roller lever, long Actuator style r.8 Ø.8 Roller lever r Lever length.6 Free position. ± 0.3 Operating position. ± 0. Release position. ± 0. Total positive opening travel 9.3 Total travel position Roller lever, short Actuator style t.8 Ø.8 Roller lever t Lever length 9. Free position.9 ± 0.3 Operating position 0.7 ± 0. Release position.0 ± 0. Total positive opening travel 9.3 Total travel position Simulated roller lever, medium Actuator style u Simulated roller lever u Lever length.6 Free position. ± 0.3 Operating position. ± 0. Release position. ± 0. Total positive opening travel 9.3 Total travel position Simulated roller lever, long Actuator style v 6 Specifications are subject to alteration without prior notice / Dimensions in mm Simulated roller lever v Lever length Free position 3.3 ± 0.3 Operating position.5 ± 0. Release position.0 ± 0. Total positive opening travel 9. Total travel position
8 8 M3 screws terminal style A 3 Single and multiple-wire conductors with wire gauges AWG (0.5 mm²....5 mm²) can be clamped with or without wire end ferrules. conductors max. with same wire gauge can be clamped per terminal Tightening torque of terminal screws should be Nm max. Terminal IP0 Screw-type terminals M3 with captive screws 35. Leads, on side opposite actuator terminal style B 6 Contact configuration: Lead Terminal / grey / blue / black Lead AWG8 / blue Lead AWG8 / grey Lead AWG8 / black 500 Flat tabs, straight terminal style D 6 Flat tabs 6.3 x 0.8 mm 9.5 Terminal Dimensions in mm / Specifications are subject to alteration without prior notice
9 9 (continued) PCB terminals, straight terminal style F 6 Terminal Hand soldering: Soldering apparatus: Hand-held soldering iron Solder: Flux-filled solder wire, leadfree Temperature/duration: 00 C; 5 s max. * Selective soldering: Soldering apparatus : Selective soldering station Solder: Leadfree solder for selective and wave soldering Temperature/duration: 300 C;,5 s; 3 mm wave distance; Flux time s Wave soldering: Soldering apparatus : Wave soldering station, wave (Wörthmann wave) Solder: Leadfree solder for selective and wave soldering Temperature/duration: 60 C; 5 s; 66 mm wave distance; conveyor speed 0.8 m/min Preheating approx. 3 s at C * PCB;.6 mm; through-contacted Solder lugs, straight terminal style G 6 Terminal Hand soldering: Soldering apparatus: Hand-held soldering iron Solder: Flux-filled solder wire, leadfree Temperature/duration: 00 C; 5 s max., pre-tinned leads Cable, on side opposite actuator terminal style L. Contact configuration: Lead / grey Terminal / blue / black 0.5 max. Lead AWG8 / blue Lead AWG8 / grey Lead AWG8 / black Cable Y - UL 57 Specifications are subject to alteration without prior notice / Dimensions in mm
10 0 Mounting Ganging (side mount) through the two transversal holes in the body of the switch by means of a collar screw or threaded bolt. Tightening torque 0.7 Nm max. Alternatively, DUO-Clips or retaining rings can be used. 3 6 ±0. Free position max. Mounting on PCB (only S870 Wx F xx / S970 Wx F xx) Holes for PCB terminals, straight ±0.0 ± max. 3x Ø.5 ±0.0 S870 / S970 PCB terminals, straight x M3 collar screw/threaded bolt including washer, Tightening torque 0.7 Nm max. Mounting Mounting plates Long mounting plate, ordering code: MP g Insulation in switch terminal area Short mounting plate, ordering code: MP k Ø3..9 up Ø Ø3. Ø6. up For mounting the switches on uninsulated surfaces use mounting plates with the following features: Suitable for side mounting of the switch on the left and on the right Material: polyamide PA66, flammability rating UL 9V-0.. Mounting When to use a roller lever Snap-action switches are designed for actuation with and without a roller lever. A roller lever, however, is required if the direction of actuation deviates more than ±5 from the plunger axis. Cam disk, diameter 50 mm Cam disk, diameter 0 mm Linear cam Cam disk diameter 0 Cam disk diameter max. max. Stroke 3 min. 0 max. Stroke 3 min. 0 Stroke 3 min. Dimensions in mm / Specifications are subject to alteration without prior notice
11 Mounting and safety instructions, environmental conditions Mounting instructions: Snap-action switches should be mounted by qualified professional staff only. Observe the required clearance and creepage distances. This is also applicable for connected wires. It is necessary to use insulating plates when ganging or mounting switches on uninsulated surfaces. The switches can be mounted in any orientation. When mounting the switches make sure to use fastening elements (e.g. screws). Only use adequate fastening elements such as cylinder head or collar screws and DUO-clips, including washers. The value for maximum tightening torque must not be exceeded. The actuator should not be pre-tensioned when in the free position. When actuated the actuator should travel beyond the operating position for at least 50% of the predefined overtravel, all the way to the total travel position. Avoid tilting the screw when mounting to prevent mechanical tension on the housing. To ensure the proper function of the positive opening operation it is necessary to depress the plunger to the end of the positive opening travel. To prevent mechanical destruction of the switch, make sure that actuation of the switch does not exceed the specified total travel position. Do not use the switch as a mechanical end stop. High-impact actuation of the switch can have a negative effect on its mechanical life. When securing stripped wire ends in the terminal clamp, make sure the wire insulation is flush with the clamp. Prevent a transfer of forces to the switch terminals, and ensure that connected leads have a functioning strain relief. Non-permissible environmental conditions: Cleaning agents, adhesives, solvents, or screw-retaining varnish must be compatible with polycarbonate (S870) and polyetherimide (S970) respectively. Never use chemicals not compatible with polycarbonate for S870 Series switches or not compatible with polyetherimide for S970 Series snap-action switches. Using such chemicals can result in cracks, deformation, breakage and dissolution of the housing or complete destruction of the respective switch. Switches sealed to IP 67 are immersion protected. That means there is no ingress of water in a harmful quantity when a new switch (which is not operated) is immersed in water ( m depth) for 30 minutes. This degree of protection cannot be warranted, however, when chemicals not compatible with polycarbonate are used for S870 Series switches or not compatible with polyetherimide for S970 Series switches. Standards Safety instructions IEC 6097-: Low-voltage switchgear and controlgear, Part : General rules IEC , Annex K: Special requirements for control switches with direct opening action UL508: Industrial control equipment IEC 6059: Degrees of protection provided by enclosures (IP Code) UL 9V-0: Flammability Standard DIN 636-6: Sensitive switches for communication technology; dimensions, type A DIN EN ISO 389-: Safety of machinery - Safety-related parts of control systems - Part : General principles for design IEC : Environmental testing - Part -6: Tests - Test Fc: Vibration (sinusoidal) IEC : Environmental testing - Part -7: Tests - Test Ea and guidance: Shock In case of moisture of any kind or impact of aggressive substances, chemicals, solvents or acids appropriate protective measures must be taken by the user in accordance with IEC :005, modified (Low-voltage electrical installations - Part -: Protection for safety - Protection against electric shock). One such measure is the limitation of the voltage range. Be sure to make regular visual inspections. Improper handling of the switch, e.g. when hitting the floor with some impact, can result in breakage, visible cracks and deformation. Defective parts must be replaced immediately! For a detailed list of all safety instructions see here: schaltbau.info/downloaden! Specifications are subject to alteration without prior notice / Dimensions in mm
12 Schaltbau GmbH For detailed information on our products and services visit our website or give us a call! with compliments: Schaltbau GmbH Hollerithstrasse Munich Germany Phone Fax Internet contact@schaltbau.de RoHS 0/65/EC Schaltbau GmbH manufactures in compliance with RoHS. The production facilities of Schaltbau GmbH have been IRIS certified since 008. Quality you can count on Schaltbau Certified to DIN EN ISO 00 since 00. For the most recent certificate visit our website. Quality you can count on Schaltbau Certified to DIN EN ISO 900 since 99. For the most recent certificate visit our website. Electrical Components and Systems for Railway Engineering and Industrial Applications Connectors Connectors manufactured to industry standards Connectors to suit the special requirements of communications engineering (MIL connectors) Charging connectors for battery-powered machines and systems Connectors for railway engineering, including UIC connectors Special connectors to suit customer requirements Snap-action switches Snap-action switches with positive opening operation Snap-action switches with self-cleaning contacts Enabling switches Special switches to suit customer requirements Contactors Single and multi-pole DC contactors High-voltage AC/DC contactors Contactors for battery powered vehicles and power supplies Contactors for railway applications Terminal bolts and fuse holders DC emergency disconnect switches Special contactors to suit customer requirements Electrics for rolling stock Equipment for driver's cab Equipment for passenger use High-voltage switchgear High-voltage heaters High-voltage roof equipment Equipment for electric brakes Design and engineering of train electrics to customer requirements B006/3/.0 Printed in Germany We reserve the right to make technical alterations without prior notice. For updated product information visit Issued 03-08
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